Omron NT20, User Manual

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Notification of the Operating Status to the PLC (Determining the NT20 Operating Status)
Section 5-5
Since all the CVM1/CV-series AR area bits are allocated to the system, they
cannot be used for applications not related to the system.
The range of each memory area differs according to the PLC type.
Note (1) LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.
(2) The EM Area is supported only by the C200HX/HG/HE-(Z)E PLCs.
1,2,3... 1. Use the Support Tool to allocate the PT status notify area (PT
→
PLC) to
the PLC memory.
2. Write a PLC program to read the “PT status” word of the PT status notify
area and check each bit status.
• Timing of PT Status Notify Bit Notification
The contents of the PT status notify area (PT
→
PLC) are written to the
PLC whenever the status of the NT20 changes during operation.
Example of PT Status Notify Bit Application
In the example below, the status of the NT20 is checked by PT status notify bit
notification.
• Settings with the Support Tool
Make the following setting with the Support Tool.
Allocated word for PT status notify area: Word 0110
• PLC Program
Create the following PLC ladder program.
• Program Operation
1,2,3... 1. When the PT operating status (bit 11215) is OFF (0), “1” (PT stopped) is
stored in DM0001.
2. When the PT operating status (bit 11215) is ON (1), “2” (PT running) is
stored in DM0001.
@MOV(21)
#0001
11215
@MOV(21)
#0002
(1)
PT stopped
Word that stores the PT status
(2)
PT running
Word that stores the PT status
DM0001
DM0001
11215